LOS ANGELES, California (CNN) -- Michael Jackson knew "exactly how his fate would be played out" and feared his death would echo that of Elvis Presley, Lisa Marie Presley wrote in an online blog posted Friday morning.

Michael Jackson and Lisa Marie Presley in 1994. Presley says, "I loved him very much" and believes he loved her.

Presley -- the daughter of Elvis, the "King of Rock," and the ex-wife of Jackson, the "King of Pop" -- wrote on her MySpace page that she wanted "to say now what I have never said before because I want the truth out there for once." Her publicist confirmed Presley wrote the blog.

She said her short marriage to Jackson -- from May 1994 until January 1996 -- "was not 'a sham' as is being reported in the press," but she divorced him because she was "in over my head in trying" to save Jackson "from the inevitable, which is what has just happened."

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"I am sitting here watching on the news [as] an ambulance leaves the driveway of his home, the big gates, the crowds outside the gates, the coverage, the crowds outside the hospital, the cause of death and what may have led up to it and the memory of this conversation hit me, as did the unstoppable tears," she wrote.

"A predicted ending by him, by loved ones and by me, but what I didn't predict was how much it was going to hurt when it finally happened."

Elvis Presley collapsed in the bathroom of his Memphis, Tennessee, mansion -- Graceland -- on August 16, 1977, at the age of 42. While his death was ruled the result of an irregular heartbeat, the autopsy report was sealed amid accusations that abuse of prescription drugs caused the problem.

"As I sit here overwhelmed with sadness, reflection and confusion at what was my biggest failure to date, watching on the news almost play by play the exact scenario I saw happen on August 16, 1977, happening again right now with Michael (A sight I never wanted to see again) just as he predicted, I am truly, truly gutted," she wrote.

"I wanted to 'save him'," she wrote. "I wanted to save him from the inevitable, which is what has just happened."

"The hardest decision I have ever had to make, which was to walk away and let his fate have him, even though I desperately loved him and tried to stop or reverse it somehow," Presley wrote.

Their marriage, which some suggested was only to help Jackson's image, was real, she said.

"It was an unusual relationship, yes, where two unusual people who did not live or know a 'normal life' found a connection, perhaps with some suspect timing on his part," she wrote. "Nonetheless, I do believe he loved me as much as he could love anyone and I loved him very much."

Presley called Jackson "an incredibly dynamic force and power that was not to be underestimated."

"When he used it for something good, it was the best and when he used it for something bad, It was really, REALLY bad," she wrote.

Presley's blog entry ended with a thank you to those who would read it.